QUESTIONSHEET 1

 

(a) skis spread force over larger area than boots                                                                                              1              

 

(b) (i)    pressure = force / area                                                                                                                      1                           1

            500 N / 0.2 m2  ´  2                                                                                                                          1                           1

            = 1250 Pa/Pascal/Nm-2                                                                                                                                                            1                         1

 

     (ii)    500N / 0.05 m2  ´  2                                                                                                                          1                           1

            = 5000 Pa/Pascal/Nm-2                                                                                                                                                            1                         1

 

     (iii)   area  =  force / pressure                                                                                                                    1                         1

            600 N / 1250 Pa                                                                                                                                1                           1

            =  0.48 m2   /2                                                                                                                                   1                             1

            =  0.24 m2                                                                                                                                                                                      1                             1

 

TOTAL  / 10

                                                                                                                                                                       

 

 

QUESTIONSHEET 2

 

(a) Any three from:

     road surface condition

     tyre condition

     brake condition

     reaction time

     speed of bicycle                                                                                                                                       3                           3

 

(b) (i)    bigger, so greater mass                                                                                                                      1                         1

 

     (ii)    deceleration  =  change in speed / time                                                                                               1              

            -10 ms-1  / 2.5 s                                                                                                                                 1                           1

            =  - 4 ms-2 (accept 4 ms‑2)                                                                                                                                                       1                             1

 

TOTAL  / 7

                                                                                                                                                                       


 

 

QUESTIONSHEET 3

 

(a) None/no forces acting                                                                                                                               1                           1

 

(b) gets faster/speeds up/velocity increases                                                                                                     1              

     force backwards produces equal and opposite force forwards/

     force one way produces equal force in opposite direction                                                                            1

                                                                                                                                                                                         1

 

(c) acceleration = force / mass                                                                                                                       1                         1

     20 000 / 1000                                                                                                                                                                                         1                           1

     = 20 ms-2 / 0.02 kms-2                                                                                                                                                                         1                           1

 

(d) acceleration = change in velocity / time                                                                                                      1              

     20 ms-2 ´  10 s                                                                                                                                         1                             1

     change in velocity = 200 ms-1                                                                                                                                                           1                         1

     final velocity = 2200 ms-1                                                                                                                                                                   1                         1

 

TOTAL  / 10

                                                                                                                                                                       

 

 

QUESTIONSHEET 4

 

(a) 250 Pa  ´­­  55 m3 / 50 m3                                                                                                                                                                    1                         1

     =  275 Pa/Nm-2                                                                                                                                                                                      1                           1

 

(b) (i)    15       

            10       

            8                                                                                                                                                          3                                  3

 

     (ii)    the volume decreases/reduces/goes down

            (NOT is less, is smaller)                                                                                                                    1                         1

 

(c) One from:

     bicycle tyres/car tyres/life jackets/dinghies/air bags in cars                                                                          1

           

TOTAL  / 7

                                                                                                                                                                       


 

 

QUESTIONSHEET 5

 

(a) arrow directly downwards labelled gravity                                                                                                  1              

     arrow directly upwards labelled air resistance                                                                                             1  

 

(b) (i)    Sweet                                                                                                                                              1                                  1

            air resistance greater for paper than sweet                                                                                         1              

 

     (ii)    force = mass ´ acceleration                                                                                                               1                         1

            0.01 kg  ´  10 ms-2 / 1000                                                                                                                  1                         1

            = 0.1 N                                                                                                                                                 1                             1

 

(c) (i)    both fall to ground                                                                                                                             1                           1

            hit ground at same time                                                                                                                     1                         1

 

     (ii)    no atmosphere to exert force/no air resistance/

            no air to exert force                                                                                                                          1                           1

 

TOTAL  / 10

                                                                                                                                                                       

 

 

QUESTIONSHEET 6

 

(a) (i)    It goes up/rises                                                                                                                                 1                           1

 

     (ii)    force is transmitted by/passed through liquid                                                                                       1              

 

(b) (i)    pressure = force / area                                                                                                                      1                           1

            2000 N / 0.001 m2

            or  2 kN / 0.001m2                                                                                                                                                                      1                           1    

            = 2000 kPa/2 000 000 Pa (or Nm-2 )                                                                                                   1                    1  

 

             

 

              TOTAL  / 5

                                                                                                                                                                       


QUESTIONSHEET 7

 

(a) equal and opposite/balanced                                                                                                                      1                         1

 

(b) 50 N                                                                                                                                                            1                                  1

     towards team X                                                                                                                                        1                         1

 

(c) 750 N                                                                                                                                                      1                             1

     towards team Y                                                                                                                                       1                         1

 

(d) acceleration = force / mass                                                                                                                       1                         1

     800 N / 200 kg                                                                                                                                         1                           1

     = 4 ms-2  towards team X                                                                                                                          1

 

TOTAL  / 9

                                                                                                                                                                       

 

 

QUESTIONSHEET 8

 

(a) weight is the force that gravity exerts on an object                                                                                      1

     mass measures the amount of matter in a body                                                                                           1

 

 

(b) (i)    Newton                                                                                                                                            1                             1

 

     (ii)    55 ´ 10                                                                                                                                             1                             1

            =  550 N                                                                                                                                           1                             1

 

     (iii)   W = m ´ g                                                                                                                                           

            so m = W / g                                                                                                                                    1                             1

            0.001 / 10                                                                                                                                         1                             1

            =  0.0001 g                                                                                                                                       1                             1

 

TOTAL  / 8

                                                                                                                                                                       

 

 

QUESTIONSHEET 9

 

(a) Alice                                                                                                                                                       1                             1

 

(b) (i)    average speed/(speed)  =  distance / time                                                                                           1

            200 m / 30 s                                                                                                                                      1                             1

            =  6.67 m-2                                                                                                                                                                                     1                             1

 

     (ii)    time  = distance / speed/average speed                                                                                               1               1

            300 m / 6.67 m-2                                                                                                                                                                          1                           1

            =  44.9 / 45 s                                                                                                                                    1                             1

 

(c) Direction of motion                                                                                                                                   1                           1

 

TOTAL  / 8

                                                                                                                                                                       

 

 

 

 

QUESTIONSHEET 10

 

(a) (i)   

Text Box: Speed / ms-1 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


                  

 

                   all points correctly plotted                                                                                                           2                         2

                   points joined with line                                                                                                                  1                           1

 

          (ii)      8 ms-1                                                                                                                                                                                     1                                  1

 

(b) acceleration = change in speed / time                                                                                                         1                    1

     5 ms-1 / 50 s                                                                                                                                             1                             1

     =  0.1 ms-2                                                                                                                                                                                               1                             1

 

(c) the forces are balanced/no resultant force/

     equal and opposite                                                                                                                                    1                           1

             

 

TOTAL  / 8

                                                                                                                                                                       

 

 

 

 

 

QUESTIONSHEET 11

 

(a) 23.5 N                                                                                                                                                     1                                  1

 

(b) (i)   

Text Box: Weight of fish / N
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


            points plotted correctly                                                                                                                      1                         2

            best fit line                                                                                                                                        1                             1

 

     (ii)    1.6 kg                                                                                                                                               1                         1

 

     (iii)   elastic limit has been reached/exceeded/

            spring stretched beyond elastic limit                                                                                                    1                    1

            spring will not return to original length                                                                                                 1

 

     (iv)   between 18 N and 19.5 N                                                                                                                  1                         1

 

TOTAL  / 8

                                                                                                                                                                       

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTIONSHEET 12

 

effort

 
(a) (i)   

pivot

 
                  

 

effort

 
 

 

 

pivot

 

load

 

load

 
 

 

 

 

 

 


                   ½ mark for each correct label, round to integer                                                                            3

 

     (ii)    wheelbarrow – load and effort on same side of pivot                                                                           1

            scissors – load & effort on opposite sides of pivot                                                                               1

 

(b) less effort applied to do same work                                                                                                            1                         1

     more movement of screwdriver                                                                                                                 1                         1

 

(c) 10 ´25 = 250                                                                                                                                            1                                  1

     250 / 100                                                                                                                                                  1                                  1

     =  2.5 N                                                                                                                                                   1                                  1

 

TOTAL  / 10

                                                                                                                                                                       

 

QUESTIONSHEET 13

 

(a) B, C, A                                                                                                                                                    1                                  1

     less likely to topple if greater mass at base                                                                                                 1                    1

 

(b) (i)    contains weight in base                                                                                                                      1                           1

 

     (ii)    point through which weight acts                                                                                                         1                         1

            producing a balance point                                                                                                                  1                           1

 

(c) suspend plywood                                                                                                                                      1                             1

     hang a weight from suspension point                                                                                                          1                         1

     marks position of string                                                                                                                             1                           1

     repeat with new position                                                                                                                           1                           1

     where lines cross is balance point                                                                                                              1                         1

 

TOTAL  / 10

                                                                                                                                                                        

 

 

 

 

 

 

 

 

 

 

 

QUESTIONSHEET 14

 

(a) (i)    spread mass over larger area                                                                                                             1                           1

            less pressure on roof                                                                                                                         1                             1

 

     (ii)    spread mass over larger area                                                                                                             1                           1

            less likely to sink in soft snow                                                                                                            1                         1

 

     (iii)   sharp knife has smaller surface area on cutting edge                                                                           1

            more pressure applied                                                                                                                       1                             1

 

(b) 600 / 2 = 300 N each foot.                                                                                                                        1

     = 300 / (0.01)2                                                                                                                                                               1

     =  3  000 000 N / m2                                                                                                                                                                            1  

     = 3000 kN/m2                                                                                                                                           1                            

 

TOTAL  / 9

                                                                                                                                                                       

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTIONSHEET 15

 

(a) LHS – 400 ´ 2  =  800                                                                                                                              1                             1

     RHS – 300 ´ 2  =  600                                                                                                                              1                           1

     difference = 200                                                                                                                                       1                             1

     position = 250 / 200                                                                                                                                   1                             1

     Ž  1.25 m from pivot on Dick’s side                                                                                                         1                         1

 

(b) (i)   

                  

80

 

70

 
Text Box: Safe load / tonnes

20

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


0

 

40

 

30

 

20

 

10

 
             

 

Extension / m

 
 

 


                   sensible scales                                                                                                                           1                                  1

                   labelled axes                                                                                                                              1                                  1

                   correct plotting                                                                                                                           2                             2  

 

     (ii)    20 m                                                                                                                                                1                                       1

 

     (iii)   27 tonnes                                                                                                                                          1                                  1

 

TOTAL  / 11

                                                                                                                                                                       

 

 

 

 

 

 

 

 

QUESTIONSHEET 16

 

(a) (i)    -10 N                                                                                                                                               1                                       1

 

     (ii)    0 N                                                                                                                                                  1                                       1

 

     (iii)   + 100 N                                                                                                                                            1                                  1

 

(b) (i)    500 000  +  250 000                                                                                                                           1                             1

            =  750 000 N                                                                                                                                    1                                  1

 

     (ii)    the exact angles                                                                                                                                1                             1

 

     (iii)   use the angles & forces to a scale                                                                                                      1                         1

            to draw triangle                                                                                                                                 1                             1

            measure side in direction of boat                                                                                                        1                         1

 

TOTAL  / 9

                                                                                                                                                                       

 

 

QUESTIONSHEET 17

 

(a) Stretches evenly                                                                                                                                       1                             1

     returns to original length                                                                                                                            1                           1

 

(b) (i)    12 cm                                                                                                                                               1                                       1

 

     (ii)    8.5 cm                                                                                                                                              1                                       1

 

(c) yes                                                                                                                                                          1                                       1

     it is no longer stretching uniformly/evenly                                                                                                   1                    1

 

(d) 50 N balance                                                                                                                                            1                            

 

TOTAL  / 7

                                                                                                                                                                       


 

 

QUESTIONSHEET 18

 

(a) (i)    useful                                                                                                                                               1                                       1

         

     (ii)    nuisance                                                                                                                                           1                                  1

         

     (iii)   nuisance                                                                                                                                           1                                  1

         

     (iv)   useful                                                                                                                                               1                                       1

         

     (v)   useful                                                                                                                                               1                                       1

 

(b) floats on air cushion                                                                                                                                  1                             1

     no contact with sea                                                                                                                                   1                           1

 

TOTAL  / 7

                                                                                                                                                                       

 

 

QUESTIONSHEET 19

 

(a) (i)    draw has mass                                                                                                                                  1                                  1

            work done to move it                                                                                                                         1                             1

 

     (ii)    you have mass                                                                                                                                  1                                  1

            work done to lift you                                                                                                                         1                             1

 

(b) climb flight of stairs                                                                                                                                  1                             1

     larger mass moved                                                                                                                                   1                             1

     through greater distance                                                                                                                            1                           1

 

              TOTAL  / 7

                                                                                                                                                                       

 

 

QUESTIONSHEET 20

 

One mark for each word/phrase

           

push

pull

friction

slowly

magnetic

tension

electrical / electrostatic

gravity

float

rise                                                                                                                                                                               10

 

              TOTAL  / 10